The Dog Bark Collar is a rechargeable and adjustable dog collar that works in a combination of sound and vibration to train your dog. The device detects when the dog barks and gives a beep warning for 1.5 seconds. After three times sound warnings, if the dog continues to bark, the anti bark collar will be combined sound with vibration, which makes the dog realize that barking is wrong and the dog will learn to control his or her barking.